Computations about the propagaton of an action potential

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Suppose that an unmyelinated fibre with a radius of $0.11\,\text{μm}$ has a propagation speed of $3\,\text{m}/\text{s}$ .

Calculate what propagation speed a fiber of $0.3\,\text{μm}$ and a fiber of $1.76\,\text{μm}$ will have (assuming that all other properties are equal). Calculate the exact answer or do it with a calculator and round off to two decimal places.

How thick must the nerve fibres be (in $\text{μm}$ ) so that a person of $2$ meter height has a reaction time of muscles in the toes less than $100$ ms? (Round off to one decimal place)

speed of a fibre with radius $0.3\,\text{μm}=\;$

$\;\text{m}/\text{s}$

speed of a fibre with radius $1.76\,\text{μm}=\;$

$\;\text{m}/\text{s}$

required radius of the nerve fibre =

$\;\text{μm}$

Bioelectricity: Passive and activve current flow along an axon

Computations about the propagaton of an action potential